Las Vegas sounds like a fabulous idea for this kind of setting, IMO. Folks visit there from all over the world. Anyone who played Gothic and its first sequel knows how intriguing it can be, walking around familiar territory after it's been devastated (and invaded by who-knows-who or what).

-- Oh, I wish I had a river I could skate away on. But it don't snow here. It stays pretty green. I'm going to make a lot of money, then I'm going to quit this crazy scene. -- [Joni Mitchell]